WO2011015014A1 - 终端接入的方法和终端 - Google Patents

终端接入的方法和终端 Download PDF

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Publication number
WO2011015014A1
WO2011015014A1 PCT/CN2009/075708 CN2009075708W WO2011015014A1 WO 2011015014 A1 WO2011015014 A1 WO 2011015014A1 CN 2009075708 W CN2009075708 W CN 2009075708W WO 2011015014 A1 WO2011015014 A1 WO 2011015014A1
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Prior art keywords
access
access message
length
message body
terminal
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PCT/CN2009/075708
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English (en)
French (fr)
Inventor
曾稹卓
凌勇
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to BRPI0924397-6A priority Critical patent/BRPI0924397A2/pt
Priority to RU2011143440/08A priority patent/RU2011143440A/ru
Priority to EP09847992.6A priority patent/EP2403310B1/en
Priority to US13/258,976 priority patent/US8582601B2/en
Publication of WO2011015014A1 publication Critical patent/WO2011015014A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0833Random access procedures, e.g. with 4-step access
    • H04W74/0841Random access procedures, e.g. with 4-step access with collision treatment
    • H04W74/085Random access procedures, e.g. with 4-step access with collision treatment collision avoidance
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/06Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information

Definitions

  • the present invention relates to the field of communications, and in particular, to a terminal access method and terminal.
  • a code division multiple access (CDMA) communication system protocol specifies that an access slot is composed of an access message prefix length (PAM SZ ) and an access message body length (MAX CAP SZ ), where parameters The MAX CAP SZ and the parameter PAM SZ are sent by the base station to the terminal through the air interface message.
  • the structure of the access slot is shown in Figure 1.
  • the length of the access slot is (1+PAM_SZ) and (3+MAX_CAP_SZ).
  • the sum value, the unit of the sum value is the frame.
  • the access slot is represented in time as the product of the length of the access slot and 20 milliseconds (ms).
  • the length of time for the terminal to access the CDMA system is mainly determined by the access slot.
  • the procedure for the terminal to access the CDMA system is as follows:
  • the terminal determines whether the access time slot is aligned. If yes, perform 102.
  • the terminal sends an access message prefix, that is, the terminal sends an access message prefix to the base station after the access time slot is aligned.
  • the terminal sends an access message body. After the access message prefix is sent, the terminal constructs an access message body according to the configured parameter MAX_CAP_SZ value, and sends the constructed access message body to the base station.
  • the access time slot is caused. As the size becomes larger, the number of terminal accesses per unit time becomes smaller, thereby causing waste of the access channel.
  • the technical problem to be solved by the present invention is to provide a method and a terminal for accessing a terminal, which can solve the problem of waste of an access channel caused by an increase in an access slot in the prior art.
  • the present invention provides a method and a terminal for accessing a terminal, and the technical method is as follows: A method for accessing a terminal, comprising: calculating a length of an access message body of an access message; The length of the access message prefix and the length of the access message body construct an access slot; when the access slot is aligned, the access message prefix is sent to the base station; and the access message body is sent to the base station.
  • a terminal comprising: a calculation module, configured to calculate a length of an access message body of an access message; and a constructing module, configured to construct an access according to a length of the configured access message prefix and a length of the access message body a first sending module, configured to send an access message prefix to the base station when the access time slot is aligned; and a second sending module, configured to send an access message body to the base station.
  • the technical solution provided by the present invention constructs an access message body by calculating the length of the access message body of the access message in real time, and replaces the length of the uniformly configured access message body with the calculated length of the access message body, and sends the constructed message body to the base station.
  • the message body can shorten the terminal access time, improve the terminal access speed and access channel utilization, increase the system access capacity, and help reduce the collision probability of access messages.
  • 1 is a structural diagram of an access slot provided by the prior art;
  • FIG. 2 is a method for accessing a terminal according to an embodiment of the present invention;
  • FIG. 3 is a structure of a terminal according to an embodiment of the present invention;
  • the embodiment of the present invention constructs an access message body by calculating the length of the access message body of the access message in real time, and replaces the length of the uniformly configured access message body with the calculated length of the access message body, and sends the constructed message body to the base station.
  • An embodiment of the present invention provides a method for accessing a terminal. As shown in FIG. 2, the method includes:
  • the length of the access message body of the access message may be calculated according to the length of the content of the access message body of the access message. For example, if the content of the access message body of the access message includes 500 bits of user data and 38 bits of other overhead, the length of the content of the access message body is 538 bits, and the length of each frame corresponding to a certain transmission rate is 192 bits. At this time, the value of the access message body is rounded up to 538/192, and the final result is 3.
  • the access time slot is configured according to the length of the configured access message prefix and the length of the access message body.
  • the length of the configured access message prefix is the access message obtained from the air interface message sent by the base station.
  • the length of the incoming message prefix is replaced by the length of the configured access message body; the first sum value of the access message body length and 3 is calculated; the length of the configured access message prefix is calculated to be the second of 1 And the value; the first and the value and the second sum value construct the access slot.
  • the calculated access message body length is less than or equal to the configured access message body length. It should be noted that, in practical applications, the calculated access message body length may also be greater than the configured access message body length.
  • the start time point of the terminal accessing the CDMA system is a boundary point of the access time slot, that is, the access start time point is an integer multiple of the access time slot.
  • the access slot alignment time is a random value between 0ms and (( 1 + PAM SZ ) + ( 3 + MAX CAP SZ ) ) x 20ms. In practical applications, the access slot alignment time is generally averaged. , that is, the average time of the access slot alignment is one-half of the access slot alignment time, that is, (( 1 + PAM SZ ) + ( 3 + MAX CAP SZ ) ) x 10ms.
  • the value of the parameter MAX_CAP_SZ is 7 and the value of the parameter PAM_SZ is 3.
  • the value of the parameter MAX_CAP_SZ and the value of the parameter PAM_SZ are obtained by the terminal from the air interface message sent by the base station.
  • the current access message is the access message L.
  • the parameter MAX_CAP_SZ value and the parameter PAM SZ value are only used to describe the embodiment, and the scope of protection of the present invention is not limited to this value.
  • the length of the access message body of the access message L is calculated to be 6 according to the length of the content of the access message body of the access message L.
  • the content of the access message body of the access message L includes 1000 bits of user data and 76 bits of other overhead, and each frame length corresponding to a certain transmission rate is 192 bits.
  • the access message body is The value of length 1076/192 is rounded and the final result is 6.
  • the length of the access message body of the access message L is only for describing the embodiment, and the scope of protection of the present invention is not limited to the value.
  • the parameter PAM_SZ value is summed with 1 to obtain a second sum value of 4 (frame); the length value 9 of the constructed access message body is summed with the second sum value 4, and the access time slot is obtained as 13.
  • the terminal sends an access message prefix to the base station.
  • the access slot alignment time is half of the product value of 13 and 20 ms, that is, 130 ms.
  • the terminal sends the constructed access message body to the base station according to the calculated length of the access message body.
  • Table 1 is a table of the relationship between the configured parameter MAX_CAP_SZ and the terminal access time. Table 1
  • the parameter PAM SZ is m, which takes a value of 3
  • the parameter MAX CAP SZ is n, which takes a value of 7.
  • the time of the terminal accessing the system includes two parts, one is the access time slot. The length of time; the second is the average time length of the access slot alignment.
  • the terminal access time is 420ms.
  • the length of the access message body of the calculated access message is 6.
  • the terminal access time is shortened by 30ms.
  • the terminal access time is shortened by 180 ms. It can be understood by those skilled in the art that if the configured parameter MAX_CAP_SZ minus the calculated length of the access message body is equal to K, the terminal access time can be shortened by (30*K) ms, where K is an integer.
  • an embodiment of the present invention provides a terminal. As shown in FIG. 1
  • the terminal includes: a calculation module, configured to calculate a length of an access message body of an access message; a module, configured to configure an access slot according to a length of the configured access message prefix and a length of the access message body, where the first sending module is configured to send an access message prefix to the base station when the access time slot is aligned And a second sending module, configured to send an access message body to the base station. Further, the calculating module is specifically configured to calculate a length of the access message body of the access message according to the length of the content of the access message body of the access message.
  • the constructing module is specifically configured to replace the length of the calculated access message body with the length of the configured access message body; calculate the first sum value of the access message body length and 3; calculate the length of the access message prefix The second sum value with 1; the first sum value and the second sum value construct the access slot.
  • the length of the calculated access message body is less than or equal to the length of the configured access message body.
  • the technical solution provided by the present invention calculates the length of the access message body of the access message in real time, and uses The calculated access message body length is used to construct the access message body instead of the uniformly configured access message body length, and the constructed access message body is sent to the base station, which can shorten the terminal access time and improve the terminal access speed and access.
  • Channel utilization increases system access capacity and helps reduce the probability of access message collisions.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Description

终端接入的方法和终端 技术领域 本发明涉及通信领域, 特别涉及一种终端接入的方法和终端。 背景技术 目前, 码分多址 (CDMA, Code Division Multiple Access)通信系统协议 规定接入时隙由接入消息前缀长度 ( PAM SZ ) 和接入消息体长度 ( MAX CAP SZ )构成, 其中, 参数 MAX CAP SZ和参数 PAM SZ由基 站通过空中接口消息发送给终端,接入时隙的结构示意图如图 1所示, 其中, 接入时隙的长度为 ( 1+PAM_SZ ) 以及 ( 3+MAX_CAP_SZ )的和值, 该和值 的单位为帧。 接入时隙在时间上体现为接入时隙的长度与 20 毫秒 (ms ) 的 乘积, 终端接入 CDMA 系统的时间长度主要由接入时隙决定, 终端接入 CDMA系统的流程如下:
101 , 终端判断接入时隙是否对齐, 如果是, 执行 102。
102, 终端发送接入消息前缀, 也就是说, 终端在接入时隙对齐后, 向 基站发送接入消息前缀。
103 , 终端发送接入消息体。 在接入消息前缀发送完毕后,终端根据配置的参数 MAX_CAP_SZ值构 造接入消息体, 并向基站发送构造的接入消息体。 然而, 由于终端的接入消息体的长度釆用统一配置的参数 MAX CAP SZ值, 且配置的参数 MAX CAP SZ值大于接入消息的实际接 入消息体长度, 因此, 会导致接入时隙变大, 单位时间内终端接入的数量变 小, 从而造成对接入信道的浪费。 发明内容 本发明所要解决的技术问题是提供一种终端接入的方法和终端,可以解 决现有技术中接入时隙变大而导致的接入信道的浪费的问题。 为了解决上述问题, 本发明提供了一种终端接入的方法和终端, 所述技 术方法如下: 一种终端接入的方法, 包括: 计算接入消息的接入消息体的长度; 根据 配置的接入消息前缀的长度和所述接入消息体的长度构造接入时隙; 在所述 接入时隙对齐时, 向基站发送接入消息前缀; 向所述基站发送接入消息体。 一种终端, 包括: 计算模块, 用于计算接入消息的接入消息体的长度; 构造模块, 用于根据配置的接入消息前缀的长度和所述接入消息体的长度构 造接入时隙; 第一发送模块, 用于在所述接入时隙对齐时, 向基站发送接入 消息前缀; 第二发送模块, 用于向所述基站发送接入消息体。 本发明提供的技术方案通过实时计算接入消息的接入消息体长度,用计 算的接入消息体长度代替统一配置的接入消息体长度来构造接入消息体, 并 向基站发送构造的接入消息体, 可以缩短终端接入时间, 提高了终端接入速 度和接入信道的利用率, 增加了系统接入容量, 同时, 有助于减少接入消息 碰撞概率。 附图说明 图 1是现有技术提供的接入时隙的结构图; 图 2是本发明的一个实施例提供的终端接入的方法; 图 3是本发明的一个实施例提供的终端的结构图。 具体实施方式 本发明实施例通过实时计算接入消息的接入消息体长度,用计算的接入 消息体长度代替统一配置的接入消息体长度来构造接入消息体, 并向基站发 送构造的接入消息体, 缩短了终端接入时间, 提高了终端接入速度和接入信 道的利用率, 增加了系统接入容量, 同时, 有助于减少接入消息碰撞 4既率。 下面结合附图及优选实施方式对本发明技术方案进行详细说明。 本发明的一个实施例提供了一种终端接入的方法, 如图 2所示, 包括:
201 , 计算接入消息的接入消息体的长度; 具体地,可以根据接入消息的接入消息体的内容的长度来计算接入消息 的接入消息体的长度。 例如, 接入消息的接入消息体的内容包括 500比特用 户数据以及 38 比特其他开销, 则接入消息体的内容的长度为 538 比特, 对 应某一传输速率设置的每一帧长度为 192比特, 此时, 接入消息体的长度为 538/192的值取整, 最后的结果为 3。
202, 根据配置的接入消息前缀的长度和接入消息体的长度构造接入时 隙; 其中,配置的接入消息前缀的长度为从基站发送的空中接口消息中获取 的接入消息的接入消息前缀的长度。 具体地, 将计算的接入消息体的长度代替配置的接入消息体的长度; 计 算接入消息体长度与 3的第一和值; 计算配置的接入消息前缀的长度与 1的 第二和值; 居第一和值和第二和值构造接入时隙。 优选地, 计算的接入消息体长度小于或等于配置的接入消息体长度。 需要说明的是, 在实际应用中, 计算的接入消息体长度也可以大于配置 的接入消息体长度。
203 , 在接入时隙对齐时, 向基站发送接入消息前缀; 终端接入 CDMA系统的开始时间点是接入时隙的边界点, 即接入开始 时间点是接入时隙的整数倍。 接入时隙对齐时间长度为 0ms 到 (( 1 + PAM SZ ) + ( 3 + MAX CAP SZ ) ) x 20ms之间的一个随机值, 在实际应用 中, 接入时隙对齐时间一般取平均值, 即接入时隙对齐平均时间为接入时隙 对齐时间的二分之一, 即(( 1 + PAM SZ ) + ( 3 + MAX CAP SZ ) ) x 10ms。
204 , 向基站发送接入消息体。 下面通过一个具体的实施例对上述实施例进行详细的说明,但该实施例 并不构成对本发明保护范围的限制。 设统一配置的参数 MAX_CAP_SZ值为 7, 参数 PAM_SZ值为 3 , 参 数 MAX_CAP_SZ值和参数 PAM_SZ值由终端从基站发来的空中接口消息中 获取, 当前的接入消息为接入消息 L。 其中, 参数 MAX_CAP_SZ值和参数 PAM SZ值只是为了描述实施例之用, 本发明的保护范围并不限于该数值。 根据接入消息 L的接入消息体的内容的长度, 计算接入消息 L的接入 消息体长度为 6。 具体地, 接入消息 L的接入消息体的内容包括 1000比特的 用户数据和 76比特的其他开销,对应某一传输速率设置的每一帧长度为 192 比特, 此时, 接入消息体的长度为 1076/192的值取整, 最后的结果为 6。 其中, 接入消息 L 的接入消息体的长度只是为了描述实施例之用, 本 发明的保护范围并不限于该数值。 将计算的接入消息体长度代替配置的参数 MAX_C AP_SZ的值 7来构造 接入消息体, 其长度为 ( 3+计算的接入消息体长度) = ( 3+6 ) =9 (帧 )„ 将参数 PAM_SZ值与 1做和, 得到第二和值为 4 (帧); 将构造的接入 消息体的长度值 9与第二和值 4做和, 得到接入时隙为 13。 接入时隙的时间 长度为 13 X 20ms=260ms„ 在接入时隙对齐时, 终端向基站发送接入消息前缀。 其中, 接入时隙对齐时间为 13与 20ms的乘积值的一半, 即 130ms。 接入消息前缀发送完毕后,终端根据计算的接入消息体的长度向基站发 送构造的接入消息体。 表 1是配置的参数 MAX_CAP_SZ值与终端接入时间的关系表。 表 1
Figure imgf000006_0001
在表 1中, 参数 PAM SZ为 m, 其取值为 3 , 参数 MAX CAP SZ为 n, 其取值为 7 , 此时, 终端接入系统的时间包括两部分, 一是接入时隙的时间 长度; 二是接入时隙对齐平均时间长度。 由于 n取值为 7 , m取值为 3 , 此 时, 接入时隙的时间长度为 (( l+m+3+n)x20 ) ms=280ms , 接入时隙对齐平 均时间为 ((l+m+3+n)x20/2 ) ms= 140ms , 终端接入时间为 ( 280+ 140 ) ms=420ms, 即釆用配置的参数 MAX_CAP_SZ, 终端接入时间为 420ms。 個— 设, 计算的接入消息的接入消息体的长度为 6 , 此时, 接入时隙的时间长度 为((l+m+3+n)x20 ) ms=260ms,接入时隙对齐平均时间为((l+m+3+n)x20/2 ) ms=130ms , 终端接入时间为 ( 260+130 ) ms=390ms , 终端接入时间缩短了 30ms。 依次类推, 当计算的接入消息的接入消息体长度为 1时, 终端接入时 间缩短了 180ms。本领域技术人员可以理解,假设配置的参数 MAX_CAP_SZ 减计算的接入消息体的长度等于 K, 则终端接入时间能缩短 (30*K ) ms, 其中, K的取值为整数。 通过上述实施例和表 1可以发现,釆用本发明实施例的方法可以缩短终 端接入时间, 提高了终端接入速度和接入信道的利用率, 增加了系统接入容 量, 同时, 有助于减少接入消息碰撞 4既率。 基于与方法实施例相同的发明构思,本发明的一个实施例提供了一种终 端, 如图 3所示, 该终端包括: 计算模块, 用于计算接入消息的接入消息体的长度; 构造模块,用于根据配置的接入消息前缀的长度和接入消息体的长度构 造接入时隙; 第一发送模块,用于在所述接入时隙对齐时,向基站发送接入消息前缀; 第二发送模块, 用于向所述基站发送接入消息体。 进一步地, 该计算模块, 具体用于根据接入消息的接入消息体的内容的 长度, 计算接入消息的接入消息体的长度。 进一步地, 该构造模块, 具体用于将计算的接入消息体的长度代替配置 的接入消息体的长度; 计算接入消息体长度与 3的第一和值; 计算接入消息 前缀的长度与 1的第二和值; 居第一和值和第二和值构造接入时隙。 优选地, 计算的接入消息体的长度小于或等于配置的接入消息体的长
本发明提供的技术方案通过实时计算接入消息的接入消息体长度,并用 计算的接入消息体长度代替统一配置的接入消息体长度来构造接入消息体, 并向基站发送构造的接入消息体, 可以缩短终端接入时间, 提高了终端接入 速度和接入信道的利用率, 增加了系统接入容量, 同时, 有助于减少接入消 息碰撞概率。

Claims

权 利 要 求 书
1. 一种终端接入的方法, 其特征在于, 包括:
计算接入消息的接入消息体的长度;
根据配置的接入消息前缀的长度和所述接入消息体的长度构造接 入时隙;
在所述接入时隙对齐时, 向基站发送接入消息前缀; 向所述基站发送接入消息体。
2. 如权利要求 1所述的方法, 其特征在于, 根据接入消息的接入消息体的 内容的长度, 计算接入消息的接入消息体的长度。
3. 如权利要求 1所述的方法, 其特征在于, 根据所述接入消息前缀的长度 和所述接入消息体的长度构造接入时隙包括:
将所述计算的接入消息体的长度代替配置的接入消息体的长度; 计算所述接入消息体长度与 3的第一和值;
计算所述接入消息前缀的长度与 1的第二和值;
才艮据所述第一和值和所述第二和值构造所述接入时隙。
4. 如权利要求 3所述的方法, 其特征在于, 所述计算的接入消息体的长度 小于或等于配置的接入消息体的长度。
5. —种终端, 其特征在于, 包括:
计算模块, 用于计算接入消息的接入消息体的长度; 构造模块,用于根据配置的接入消息前缀的长度和所述接入消息体 的长度构造接入时隙;
第一发送模块, 用于在所述接入时隙对齐时, 向基站发送接入消息 前缀;
第二发送模块, 用于向所述基站发送接入消息体。
6. 如权利要求 5所述的终端, 其特征在于, 所述计算模块, 具体用于根据 接入消息的接入消息体的内容的长度, 计算接入消息的接入消息体的长 度。
7. 如权利要求 5所述的终端, 其特征在于, 所述构造模块, 具体用于将所 述计算的接入消息体的长度代替配置的接入消息体的长度; 计算所述接 入消息体长度与 3的第一和值; 计算所述接入消息前缀的长度与 1的第 二和值; 居所述第一和值和所述第二和值构造所述接入时隙。
8. 如权利要求 7所述的终端, 其特征在于, 所述计算的接入消息体的长度 小于或等于配置的接入消息体的长度。
PCT/CN2009/075708 2009-08-06 2009-12-18 终端接入的方法和终端 WO2011015014A1 (zh)

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